UT1553B/BCRTMP-WPA 데이터 시트보기 (PDF) - Aeroflex UTMC
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UT1553B/BCRTMP-WPA Datasheet PDF : 78 Pages
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1.0 INTRODUCTION
The monolithic CMOS UT1553 BCRTMP provides the
system designer with an intelligent solution to
MIL-STD-1553 multiplexed serial data bus design
problems. The UT1553 BCRTMP is a single-chip device
that implements two of the three defined MIL-STD-1553
functions - Bus Controller and Remote Terminal - and is
flexible enough to conform to many of the MIL-STD-1553
“industry standards” created between and including releases
of MIL-STD-1553A and MIL-STD-1553B. Designed to
reduce host CPU overhead, the BCRTMP’s powerful state
machines automatically execute message transfers, provide
interrupts, and generate status information. The BCRTMP’s
register-based architecture allows it to conform to the many
protocol options regarding status words, mode codes, use
of Broadcast, Message Error, and RT Response Time as
specified in the various “1553 standards.” Multiple registers
offer many programmable functions as well as extensive
information for host use. In the BC mode, the BCRTMP
uses a linked-list message scheme to provide the host with
message chaining capability. The BCRTMP enhances
memory use by supporting variable-size, relocatable data
blocks. In the RT mode, the BCRTMP implements time-
tagging and message history functions. It also supports
multiple (up to 128) message buffering and variable length
messages to any subaddress.
The UT1553 BCRTMP is an intelligent, versatile, and easy
to implement device -- a powerful asset to system designers.
1.1 Features - Remote Terminal (RT) Mode
Indexing
The BCRTMP is programmable to index or buffer messages
on a subaddress-by-subaddress basis. The BCRTMP, which
can index as many as 128 messages, can also assert an
interrupt when either the selected number of messages is
reached or every time a specified subaddress is accessed.
Variable Space Allocation
The BCRTMP can use as little or as much memory (up to
64K) as needed.
Selectable Data Storage
Address programmability within the BCRTMP provides
flexible data placement and convenient access.
Sequential Data Storage
The BCRTMP stores/retrieves, by subaddress, all messages
in the order in which they are transacted.
Sequential Message Status Information
The BCRTMP provides message validity, time-tag, and
word-count information, and stores it sequentially in a
separate, cross-referenced list.
Illegalizing Mode Codes and Subaddresses
The host can declare mode codes and subaddresses illegal
by setting the appropriate bit(s) in memory.
Programmable Interrupt Selection
The host CPU can select various events to cause an interrupt
with provision for high and standard priority interrupts.
Interrupt History List
The BCRTMP provides an Interrupt History List that
records, in the order of occurrence, the events that caused
the interrupts. The list length is programmable.
1.2 Features - Bus Controller (BC) Mode
Multiple Message Processing
The BCRTMP autonomously processes any number of
messages or lists of messages that may be stored in a 64K
memory space.
Automatic Intermessage Delay
When programmed by the host, the BCRTMP can delay a
host-specified time before executing the next message in
sequence.
Automatic Polling
When polling, the BCRTMP interrogates the remote
terminals and then compares their status word responses to
the contents of the Polling Compare Register. The BCRTMP
can interrupt the host CPU if an erroneous remote terminal
status word response occurs.
Automatic Retry
The BCRTMP can automatically retry a message on busy,
message error, and/or response time-out conditions. The
BCRTMP can retry up to four times on the same or on the
alternate bus.
Programmable Interrupt Selection
The host CPU can select various events to cause an interrupt
with provision for high and standard priority interrupts.
Interrupt History List
The BCRTMP provides an Interrupt History List that
records, in the order of occurrence, the events that caused
the interrupts. The list length is programmable.
Variable Space Allocation
The BCRTMP uses as little or as much memory (up to 64K)
as needed.
Selectable Data Storage
Address programmability within the BCRTMP provides
flexible data placement and convenient access.
BCRTMP-3
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